Algot Enevoldsen, The daddy of PANDORA, is known with the initials ALE, and fifty represents the level of silver used in the jewellery. HK is actually a trademark that means Harriet Kelsall. They design and provide jewellery all over the United kingdom also to other locations likewise.  Can “JP” also https://daltonldfgi.thezenweb.com/jp88-an-overview-75224315